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Development and characterization of bulk fill composites light cured using silver nanoparticles surface plasmon resonance as a photoinitiator system

Grant number: 17/22195-9
Support type:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): March 01, 2018
Effective date (End): February 28, 2019
Field of knowledge:Health Sciences - Dentistry - Dental Materials
Principal researcher:Américo Bortolazzo Correr
Grantee:Mateus Garcia Rocha
Supervisor abroad: Jean-François Roulet
Home Institution: Faculdade de Odontologia de Piracicaba (FOP). Universidade Estadual de Campinas (UNICAMP). Piracicaba , SP, Brazil
Research place: University of Florida, Gainesville (UF), United States  


Objective: To develop and characterize bulk fill composites light cured using silver nanoparticles (AgNP) surface plasmon resonance (SPR) as a photoinitiator system. Materials and Methods: AgNP will be synthetized using sodium borohydride reduction method. Solution absorption spectrophotometric analysis will be determined in the 300-800 nm range using a UV-Vis spectrophotometer and AgNPs average size will be evaluated with transmission electron microscope. Experimental bulk fill composites accordingly to FAPESP #2016/06019-3 phD research project will be produced with different AgNP and thermal initiators concentration. Camphorquinone associated with a tertiary amine will be used as control group. Light transmittance (LT) through each bulk fill composite will be recorded during light curing using a spectrometer (MARC Resin Calibrator). CIELab co-ordinates (L. a and b) will be recorded for each experimental resin composite pre- and immediately post-aging using a spectrophotometer (Konica Minolta). Near-Infrared spectroscopy will be used to map the degree of conversion (DC) in depth and the same specimens' locations analyzed for DC will be used to determine Knoop Hardness using a microhardness tester. The flexural strength (FS) and flexural modulus (FM) will be evaluated using a three-point bend test. Data will be analyzed according to the different experimental designs (alpha=0.05 and beta=0.2). (AU)

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Scientific publications (6)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DE OLIVEIRA, D. C. R. S.; ROCHA, M. G.; CORRER, A. B.; FERRACANE, J. L.; SINHORETI, M. A. C.. Effect of Beam Profiles From Different Light Emission Tip Types of Multiwave Light-emitting Diodes on the Curing Profile of Resin-based Composites. Operative Dentistry, v. 44, n. 4, p. 365-378, . (17/22195-9, 16/06019-3, 16/05823-3, 14/03028-6, 17/22161-7, 13/04241-2)
FAVARAO, J.; OLIVEIRA, D. C. R. S.; ZANINI, M. M.; ROCHA, M. G.; CORRER-SOBRINHO, L.; SINHORETI, M. A. C.. Effect of curing-light attenuation on color stability and physical and chemical properties of resin cements containing different photoinitiators. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS, v. 113, . (17/22161-7, 17/22195-9, 16/06019-3, 16/05823-3)
ROCHA, MATEUS GARCIA; DE OLIVEIRA, DAYANE CARVALHO RAMOS SALLES; DE MENEZES, LIVIA RODRIGUES; ROULET, JEAN-FRANCOIS; SINHORETI, MARIO ALEXANDRE COELHO; CORRER, AMERICO BORTOLAZZO. he use of an elastomeric methacrylate monomer (Exothane 24) to reduce the polymerization shrinkage stress and improve the two-body wear resistance of bulk fill composite. Dental Materials, v. 38, n. 2, p. E43-E57, . (17/22195-9, 16/05823-3, 17/22161-7)
JAMILLE FAVARÃO; DAYANE CARVALHO RAMOS SALLES DE OLIVEIRA; MATEUS GARCIA ROCHA; MAURÍCIO MATTÉ ZANINI; GABRIEL FLORES ABUNA; MARCIO JOSÉ MENDONÇA; MÁRIO ALEXANDRE COELHO SINHORETI. Solvent Degradation and Polymerization Shrinkage Reduction of Resin Composites Using Isobornyl Methacrylate. Brazilian Dental Journal, v. 30, n. 3, p. 272-278, . (17/22161-7, 17/22195-9, 16/06019-3, 16/05823-3)
LARA, LUCAS; ROCHA, MATEUS GARCIA; DE MENEZES, LIVIA RODRIGUES; CORRER, AMERICO BORTOLAZZO; COELHO SINHORETI, MARIO ALEXANDRE; OLIVEIRA, DAYANE. Effect of combining photoinitiators on cure efficiency of dental resin-based composites. Journal of Applied Oral Science, v. 29, p. 1-9, . (17/22161-7, 17/22195-9, 16/06019-3, 16/05823-3)
ROCHA, M. G.; DE OLIVEIRA, D. C. R. S.; SINHORETI, M. A. C.; ROULET, J. F.; CORRER, A. B.. The Combination of CQ-amine and TPO Increases the Polymerization Shrinkage Stress and Does Not Improve the Depth of Cure of Bulk-fill Composites. Operative Dentistry, v. 44, n. 5, p. 499-509, . (17/22161-7, 16/05823-3, 17/22195-9)

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